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A 15 N block lifted straight upward by a hand applying a force of 15 N has an initial kinetic energy of 7 J. If the block is lifted 3 m, how much work does the hand do? J
What is the block's final kinetic energy? J
five resistors are connected to a battery with an emf of 12 V and internal resistance of 1 ohm. calculate the external resistance of the circuit
If the aspirin could be converted completely into thermal energy, how many miles will the car go on a single tablet.
Two capacitors (C1 = 6.00 µF and C2 = 11.0 µF) are now connected in series and to a 9.00-V battery, Find the charge on each capacitor
A baseball pitcher can throw a ball with a speed of 40. He is in the back of a pickup truck that is driving away from you. He throws the ball in your direction, and it floats toward you at a lazy 30. What is the speed of truck.
Why does a shirt or blouse taken from a clothes dryer sometimes cling to your body?
A large boat with a weight of 70000 tons moves at constant speed due west. What is the net force on the boat.
Suppose the light bulb in the figure below is replaced with a short wire of zero resistance, and the resistance of the rails is negligible, What is the current in the rod
A swimming pool has dimensions 29 m x 34 m and a flat bottom, what is the total force due to the water on the bottom
An 8.5- {rm kg} point mass and a 15- {rm kg} point mass are held in place 50- {rm cm} apart. A particle of mass m is released from a point between the two masses 19- {rm cm} from the 8.5-{rm kg} mass along the line connecting two fixed masses.
A hospital nurse walks 25 m to a patient's room at the end of the hall in 0.50 min. She talks with the patient for 4.0 min, What was the nurse's average speed
A 150 g aluminum cup contains 150 g of water and both are at 13 C. If you add 150 g of hot water at 90 C what is the final temperature at thermal equilibrium? How much hot water at 90 C needs to be added to achieve a final temperature of 44 C?
Suppose you point a pinhole camera at a 15-m-tall tree that is 75m away. If the film is 22cm behind the pinhold, what will be the size of the tree's image on the film
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